feat: add Devtron in dev mode

remove unused settings item
add setting to disable hardware acceleration (enabled by default)
optimize main.js startup loading

config/config.default.json

@@ -13,5 +13,6 @@
   "outputTitleCheck": true,
   "downloadSystem": true,
   "notifySystem": true,
+  "enableHardwareAcceleration": true,
   "theme": "dark" 
 }